CVE-2021-39891

MediumCVSS 4.9/10Last modified Jun 17, 2026

Description

In all versions of GitLab CE/EE since version 8.0, access tokens created as part of admin's impersonation of a user are not cleared at the end of impersonation which may lead to unnecessary sensitive info disclosure.

Metrics

CVSS 3.1 4.9/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-212

Affected software

No affected versions have been published.

Timeline

Published
Oct 5, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

CVE-2021-398924.3In all versions of GitLab CE/EE since version 12.0, a lower privileged user can import users from projects that they don't have a maintainerCVE-2021-398937.5A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.CVE-2021-398945.4In all versions of GitLab CE/EE since version 8.0, a DNS rebinding vulnerability exists in Fogbugz importer which may be used by attackers tCVE-2021-398954.5In all versions of GitLab CE/EE since version 8.0, an attacker can set the pipeline schedules to be active in a project export so when an unCVE-2021-398963.8In all versions of GitLab CE/EE since version 8.0, when an admin uses the impersonate feature twice and stops impersonating, the admin may bCVE-2021-398975.3Improper access control in GitLab CE/EE version 10.5 and above allowed subgroup members with inherited access to a project from a parent groCVE-2021-398985.3In all versions of GitLab CE/EE since version 10.6, a project export leaks the external webhook token value which may allow access to the prCVE-2021-398994.2In all versions of GitLab CE/EE, an attacker with physical access to a user’s machine may brute force the user’s password via the change pasCVE-2021-39906.5showdoc is vulnerable to Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)CVE-2021-399002.7Information disclosure from SendEntry in GitLab starting with 10.8 allowed exposure of full URL of artifacts stored in object-storage with aCVE-2021-399012.7In all versions of GitLab CE/EE since version 11.10, an admin of a group can see the SCIM token of that group by visiting a specific endpoinCVE-2021-399024.3Incorrect Authorization in GitLab CE/EE 13.4 or above allows a user with guest membership in a project to modify the severity of an incident
CVE-2021-39891: Medium severity, CVSS 4.9 | Vulnix